Friedrich August, Hereditary Prince o Saxe-Eisenach
| Friedrich August | |
|---|---|
| Hereditary Prince o Saxe-Eisenach | |
 1677 portrait o the Hereditary Prince bi Caspar Netscher | |
| Born | 30 October 1663 Friedewald, Rhineland-Palatinate |
| Dee'd | 19 September 1684 (aged 20) Bratislava, Slovakie |
| Buirial | Kirk o Saunt-George o Eisenach |
| Faither | Johann Georg I, Duke o Saxe-Eisenach |
| Mither | Princess Eleonore Erdmuthe o Saxe-Eisenach |
Friedrich August, Hereditary Prince o Saxe-Eisenach 30 October 1663 - 19 September 1684) wis the hier o Saxe-Eisenach but niver accedit tae the teetle o Duke o Saxe-Eisenach. He wis the son o Johann Georg I, Duke o Saxe-Eisenach. He wis also a brither o Princess Eleonore Erdmuthe o Saxe-Eisenach, the mither o the future Caroline o Ansbach.